“…The most common study location was the United States, 16,20,23,29,39,40,53,55,58,63,68,72,74,78,81,86,90,93,95,101 but studies were reported from Australia, 87,91,98,100 Canada, 21,47,54 Denmark, 19 Germany, 76,99 Indonesia, 82 Japan, 48,70 Korea, 97 the Netherlands, 43 and from multiple countries. 91 Settings included hospital clinics, 19 universities, 20,39,58,99 primary care, 29,40,53 and a law enforcement work setting. 55 Majority of the reviewed studies used the Pittsburgh Sleep Quality Index (PSQI) 18,20,21,29,…”